Input

The Android input subsystem nominally consists of an event pipeline that
traverses multiple layers of the system. At the lowest layer, the physical input
device produces signals that describe state changes such as key presses and
touch contact points.

Neural Networks

The Android Neural Networks API (NNAPI) runs computationally intensive
operations for machine learning. This document provides an overview on how to
implement a Neural Networks API driver for Android 9.

Peripherals and accessories

Using a suite of standard protocols, you can implement compelling peripherals
and other accessories that extend Android capabilities in a wide range of
Android-powered devices.